Sounds like you've found an inexpensive tent heater.

But flame + inside tent (meltable, if not directly flammable) + carbon monoxide + pressurized flammable gas + confined space with no rapid exit + apparatus and seals made in China (not the most safety-conscious manufacturing location!) + probably far away from medical help = I wouldn't do that myself.

Treat that setup with the utmost care, and stay safe.